[INFO] fetching crate bitfield-register 0.2.1...
[INFO] checking bitfield-register-0.2.1 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate bitfield-register 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate bitfield-register 0.2.1 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitfield-register 0.2.1
[INFO] finished tweaking crates.io crate bitfield-register 0.2.1
[INFO] tweaked toml for crates.io crate bitfield-register 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0c6129781a0b3323166fce55c3cdb9522e58380ec9f9b029f5ee8cd2d4dcb3e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a0c6129781a0b3323166fce55c3cdb9522e58380ec9f9b029f5ee8cd2d4dcb3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0c6129781a0b3323166fce55c3cdb9522e58380ec9f9b029f5ee8cd2d4dcb3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0c6129781a0b3323166fce55c3cdb9522e58380ec9f9b029f5ee8cd2d4dcb3e", kill_on_drop: false }`
[INFO] [stdout] a0c6129781a0b3323166fce55c3cdb9522e58380ec9f9b029f5ee8cd2d4dcb3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aceb5eb32e84cc231625921847f3a96672045cb926bece22adc4666e7b0ade31
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "aceb5eb32e84cc231625921847f3a96672045cb926bece22adc4666e7b0ade31", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitfield-register-macro v0.2.1
[INFO] [stderr]     Checking bitfield-register v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `FromBitfield`, `IntoBitfield`
[INFO] [stdout]    --> src/lib.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 107 |     use super::{FromBitfield, IntoBitfield};
[INFO] [stdout]     |                 ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | /     macro_rules! test_into {
[INFO] [stdout] 110 | |         ($value:expr, $expected_array:expr, $array_len:expr) => (
[INFO] [stdout] 111 | |             let array: [u8;$array_len] = $value.into_bitfield();
[INFO] [stdout] 112 | |             assert_eq!(
[INFO] [stdout] ...   |
[INFO] [stdout] 116 | |         )
[INFO] [stdout] 117 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 | /     macro_rules! test_from {
[INFO] [stdout] 120 | |         ($value_type:ty, $array_len:expr, $array:expr, $expected_value:expr) => (
[INFO] [stdout] 121 | |             assert_eq!(
[INFO] [stdout] 122 | |                 <$value_type as FromBitfield<[u8;$array_len]>>::from_bitfield($array),
[INFO] [stdout] ...   |
[INFO] [stdout] 125 | |         )
[INFO] [stdout] 126 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `Command { std: "docker" "inspect" "aceb5eb32e84cc231625921847f3a96672045cb926bece22adc4666e7b0ade31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aceb5eb32e84cc231625921847f3a96672045cb926bece22adc4666e7b0ade31", kill_on_drop: false }`
[INFO] [stdout] aceb5eb32e84cc231625921847f3a96672045cb926bece22adc4666e7b0ade31